![](https://lstatic.shangxueba.com/sxbzda/h5/images/m_q_title.png)
Whatarethepossiblecausesofcolony—collapsedisordergivenbythescientists? A.Worse
What are the possible causes of colony—collapse disorder given by the scientists?
A.Worsening environment.
B.Disease and chemicals.
C.Dwindling number of flowers around.
D.Changes in genes’ structures.
![](https://lstatic.shangxueba.com/sxbzda/h5/images/tips_org.png)